CN220064325U - Cell resistor testing device - Google Patents

Abstract

The utility model belongs to the technical field of battery testing equipment, and discloses a cell resistor testing device which comprises a fixed seat, a driving piece, a fixed piece, two elastic assemblies and two probe assemblies, wherein the fixed seat is provided with a plurality of elastic assemblies; the battery cell can be installed in the fixing base, the driving piece sets up in the fixing base, the driving piece drive is connected in the output of driving piece, two elastic component intervals set up in the fixing piece, and elastic component sliding connection is in the fixing piece, elastic component enables the distance between probe subassembly and the fixing piece adjustable, two probe subassemblies set up in the one end of two elastic component respectively, the distance between two probe subassemblies is adjustable, the driving piece can drive the fixing piece, drive probe subassembly simultaneously towards battery cell motion and butt in the utmost point ear of battery cell. According to the structure, the elastic device is added between the probe and the driving piece, so that the pressure of the probe when the probe is abutted against the lug is reduced, the battery cores with different heights and different lug distances can be directly tested, excessive adjustment is not needed, and the compatibility is strong.

Description

Cell resistor testing device

Technical Field

The utility model relates to the technical field of battery testing equipment, in particular to a cell resistor testing device.

Background

In the prior art, the patent with the bulletin number of CN202794337U discloses a resistance testing device of a polymer battery cell, which comprises a detection table for placing a battery cell, a cylinder which can stretch out and draw back along the height direction, a fixed plate which is positioned above the detection table and is fixed on a cylinder piston rod, a bayonet fixed on the fixed plate, and two probe assemblies which are movably arranged on the fixed plate, wherein an inductor is arranged on the detection table and is used for receiving a signal of whether the battery cell is in place or not and transmitting the signal to a controller, the output end of the controller is connected with the control end of the cylinder, the controller can start the cylinder, and the cylinder drives two probes downwards to enable the two probes to be in contact with the electrode lugs of the detected battery cell, so that the resistance testing of the battery cell is finished.

In the testing process of the resistance testing device, as the driving of the probe is performed by the air cylinder, the air cylinder can quickly abut the probe against the electrode lug of the battery cell, the impact force can cause the phenomenon of crush injury to the electrode lug, and the fixing screw of the probe can be loosened for a long time; meanwhile, the heights of the battery cell lugs are different and have deviation, the stroke of the probe of the testing device is fixed, if the stroke is required to be changed, the stroke of the cylinder is required to be changed, the operation is complex, and the suitability adjustment is carried out every time, so that the time and the labor cost are wasted.

Therefore, it is needed to design a device for testing the cell resistor to solve the above-mentioned technical problems.

Disclosure of Invention

The utility model aims to provide a cell resistor testing device which can be used for increasing an elastic device between a probe and a driving piece, relieving the pressure when the probe is abutted against a tab, and can be used for directly testing cells with different heights and different tab distances without excessive adjustment, and has strong compatibility.

To achieve the purpose, the utility model adopts the following technical scheme:

the cell resistor testing device comprises a fixed seat, a driving piece, a fixed piece, two elastic components and two probe components; wherein, the electricity core can be installed in above-mentioned fixing base, above-mentioned driving piece sets up in the fixing base, above-mentioned mounting drive connects in the output of above-mentioned driving piece, two above-mentioned elastic component intervals set up in above-mentioned mounting, and above-mentioned elastic component sliding connection is in above-mentioned mounting, the distance between above-mentioned elastic component enabling above-mentioned probe subassembly and the above-mentioned mounting is adjustable, two above-mentioned probe subassemblies set up in the one end of two above-mentioned elastic component respectively, the distance between two above-mentioned probe subassemblies is adjustable, the above-mentioned driving piece can drive above-mentioned mounting, drive the above-mentioned probe subassembly simultaneously towards above-mentioned electricity core motion and the tab of butt in above-mentioned electricity core.

Optionally, the elastic component includes:

the guide rod is arranged on the fixing piece in a sliding penetrating mode and is connected with the probe assembly; and the elastic piece is sleeved on the guide rod and arranged between the probe assembly and the fixing piece.

Optionally, one end of the guide rod is provided with a limiting part, the limiting part can be abutted against the fixing piece, and the other end of the guide rod is slidably arranged on the fixing piece in a penetrating manner and is connected with the probe assembly.

Optionally, the elastic component further includes a linear bearing, one end of the linear bearing is disposed on the fixing piece, the limiting portion can be abutted against the other end of the linear bearing, and the other end of the guide rod sequentially slides through the linear bearing and the fixing piece and is connected to the probe component.

Optionally, the elastic component is a hydraulic buffer.

Optionally, the elastic component includes a cylinder and a piston component, the cylinder is disposed on the fixing piece, one end of the piston component is slidably connected to the cylinder, and the other end of the piston component is hermetically inserted into the cylinder and connected to the probe component.

Optionally, the probe assembly includes a connector and a probe, wherein one end of the connector is connected to the elastic assembly, and the other end is connected to the probe.

Optionally, the connector includes a main body portion and a sliding portion, the sliding portion is vertically disposed at one end of the main body portion, the sliding portion is provided with a first oblong hole extending along a length direction of the sliding portion, the other end of the main body portion is connected to the probe, the electrical resistance testing device further includes a first nut, and the elastic component is threaded through the first oblong hole and is connected with the first nut.

Optionally, a distance between the probe and the elastic component is adjustable.

Optionally, a second oblong hole extending along a length direction of the main body is formed at the other end of the main body, the probe assembly further includes a second nut, and the elastic assembly is threaded through the second oblong hole and is connected with the second nut.

The utility model has the beneficial effects that:

the utility model provides a cell resistor testing device, which is characterized in that an elastic component is arranged between a probe component and a fixing piece, so that the probe component and the fixing piece are elastic, when a driving piece drives the fixing piece to move towards a cell, the probe component moves along with the fixing piece, and after the probe component is abutted against a tab of the cell, the elastic component is compressed, so that the pressure of the probe component abutted against the tab is not excessive, and the tab is prevented from being damaged. In addition, due to the size diversity of the battery cells, the distance between the electrode lugs of the battery cells and the probe assembly is changed, the stroke of the driving piece is set to be larger than the maximum distance between the probe assembly and the electrode lugs of the battery cells, namely, the elastic assembly is in a compressed state after the stroke of the driving piece is finished, and the resistance test of the battery cells with various sizes can be ensured; meanwhile, the distance between the two probe assemblies is adjustable, so that the cell resistor testing device is adapted to cells with different electrode lug distances, and the compatibility of the cell resistor testing device is improved.

Drawings

FIG. 1 is an exploded view of a cell resistance testing device according to an embodiment of the present utility model;

FIG. 2 is an isometric view of a device for testing cell resistance according to an embodiment of the present utility model;

FIG. 3 is a front view of a device for testing the resistance of a battery cell according to an embodiment of the present utility model;

fig. 4 is a side view of a device for testing the resistance of a cell according to an embodiment of the present utility model.

In the figure:

10. a driving member; 20. a fixing member;

30. an elastic component; 31. a guide rod; 311. a limit part; 32. an elastic member; 33. a linear bearing;

40. a probe assembly; 41. a connecting piece; 411. a main body portion; 4111. a second oblong hole; 412. a sliding part; 4121. a first oblong hole; 42. a probe;

200. a battery cell; 210. and a tab.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The following describes a device for testing a cell resistor according to the present utility model with reference to fig. 1 to 4.

The embodiment discloses a cell resistor testing device, which is used for carrying out resistor testing on a cell 200, can slow down the pressure when a probe 42 is abutted against a tab 210, can directly test the cell 200 with different heights and different tab 210 distances, does not need to carry out excessive adjustment, and has strong compatibility.

Specifically, as shown in fig. 1 to 4, the electrical resistance testing device includes a fixing base (the fixing base is omitted), a driving member 10, a fixing member 20, two elastic assemblies 30, and two probe assemblies 40; wherein, the electric core 200 can be installed in the fixing base, the driving piece 10 sets up in the fixing base, the driving piece 20 drive is connected in the output of driving piece 10, two elastic component 30 intervals set up in the fixing piece 20, and elastic component 30 sliding connection is in the fixing piece 20, elastic component 30 can make the distance between probe subassembly 40 and the fixing piece 20 adjustable, two probe subassemblies 40 set up respectively in the one end of two elastic component 30, the distance between two probe subassemblies 40 is adjustable, driving piece 10 can drive the fixing piece 20, drive probe subassembly 40 simultaneously towards electric core 200 motion and butt in the utmost point ear 210 of electric core 200.

According to the cell resistor testing device of the embodiment, the elastic component 30 is arranged between the probe component 40 and the fixing piece 20, so that elasticity is provided between the probe component 40 and the fixing piece 20, when the driving piece 10 drives the fixing piece 20 to move towards the cell 200, the probe component 40 moves along with the fixing piece 20, after the probe component 40 abuts against the lug 210 of the cell 200, the elastic component 30 can compress, so that the pressure of the probe component 40 abutting against the lug 210 is not too high, and damage to the lug 210 is avoided.

In addition, due to the dimensional diversity of the battery cell 200, the distance between the tab 210 of the battery cell 200 and the probe assembly 40 is changed, and the stroke of the driving member 10 in this embodiment is set to be larger than the maximum distance between the probe assembly 40 and the tab 210 of the battery cell 200, that is, the elastic assembly 30 is in a compressed state after the stroke of the driving member 10 is completed, so that resistance testing of the battery cells 200 with various sizes can be ensured; meanwhile, the distance between the two probe assemblies 40 is adjustable, so that the cell resistance testing device can be adapted to the cells 200 with different pitches of the tabs 210, and the compatibility of the cell resistance testing device is improved.

Alternatively, the driving member 10 is a cylinder, which can set the movement stroke of the output end, and occupies a small space. It should be understood that the driving member 10 may be configured by a linear motor, etc., and may be configured to drive the fixing member 20 to perform linear motion, which is not particularly limited herein.

In an alternative embodiment, as shown in fig. 1 to 4, the elastic component 30 includes a guide rod 31 and an elastic member 32, where the guide rod 31 is slidably disposed through the fixing member 20 and is connected to the probe component 40, and the elastic member 32 is sleeved on the guide rod 31 and is disposed between the probe component 40 and the fixing member 20, so that after the probe component 40 moves along with the fixing member 20 to abut against the tab 210, the elastic member 32 is compressed, and meanwhile, the guide rod 31 slides relative to the fixing member 20, so that the pressure of the probe component 40 abutting against the tab 210 is not too high, and meanwhile, due to the arrangement of the elastic member 32, the contact area between the probe component 40 and the tab 210 is ensured, the testing problem caused by unstable connection between the two is avoided, and the accuracy of the electrical resistance testing device is improved.

Optionally, one end of the guide rod 31 is provided with a limiting part 311, the limiting part 311 can be abutted to the fixing piece 20, the other end of the guide rod 31 is slidably arranged on the fixing piece 20 and connected to the probe assembly 40, the setting of the limiting part 311 limits the guide rod 31, the guide rod 31 is prevented from being separated from the fixing piece 20 in the sliding process, the limiting part 311 is abutted to the fixing piece 20 in the initial state, and after the probe assembly 40 moves to be abutted to the tab 210, the guide rod 31 slides relative to the fixing piece 20.

Illustratively, the elastic member 32 is a spring, which is simple in structure and low in cost.

Further, the elastic component 30 further includes a linear bearing 33, one end of the linear bearing 33 is disposed on the fixing member 20, the limiting portion 311 can be abutted against the other end of the linear bearing 33, the other end of the guide rod 31 sequentially slides through the linear bearing 33 and the fixing member 20 and is connected to the probe component 40, the linear bearing 33 is disposed to guide the movement direction of the guide rod 31, the guide rod 31 is guaranteed to move only in a linear manner, so that the probe component 40 is guaranteed to be abutted against the tab 210 only if the position of the battery cell 200 is accurate, the reliability of connection between the probe component 40 and the tab 210 is improved, and the abrasion of the guide rod 31 is reduced due to the arrangement of the linear bearing 33, and the service life of the guide rod 31 is prolonged.

Optionally, the linear bearing 33 and the fixing member 20 are fixedly connected by threaded connection.

In an alternative embodiment, the spring assembly 30 is a hydraulic damper that also dampens the motion of the probe assembly 40.

Specifically, the elastic assembly 30 includes a cylinder and a piston assembly, the cylinder is disposed on the fixing member 20, one end of the piston assembly is slidably connected to the cylinder, and the other end of the piston assembly is hermetically inserted through the cylinder and connected to the probe assembly 40. That is, an inner cavity is formed between the piston assembly and the inner wall at one side of the cylinder body, the inner cavity is filled with hydraulic oil, an orifice is arranged at one side of the cylinder body, an outer cavity is arranged between the cylinder body and the outer structure, under the general condition, the piston assembly is positioned at the other side of the cylinder body, the inner cavity is filled with hydraulic oil, when the other end of the piston assembly is subjected to resistance, namely, after the probe assembly 40 is abutted against the lug 210, the piston assembly moves towards one side of the cylinder body, so that the hydraulic oil in the inner cavity enters the outer cavity through the orifice, the buffering of the pressure of the probe assembly 40 is realized, the hydraulic oil also has certain resistance to the piston assembly, the contact area between the probe assembly 40 and the lug 210 is ensured, and the reliability of connection between the probe assembly 40 and the lug 210 is improved.

Further, the piston assembly includes a piston rod and a piston, the piston is fixed to one end of the piston rod, and the piston slides in the cylinder, and the other end of the piston rod is connected to the probe assembly 40. Optionally, the other end of the piston rod is threaded, and the piston rod is in threaded connection with the probe assembly 40 to achieve a fixed connection therebetween.

In this embodiment, as shown in fig. 1 to 4, the probe assembly 40 includes a connecting member 41 and a probe 42, one end of the connecting member 41 is connected to the elastic assembly 30, and the other end is connected to the probe 42, that is, the elastic member 32 is disposed between the connecting member 41 and the fixing member 20, so that the compressibility of the elastic member 32 can be ensured, the size of the probe 42 is not affected, and the size of the probe 42 is not changed; meanwhile, a certain distance exists between the probe 42 and the elastic component 30, namely a certain distance exists between the battery cell 200 and the elastic component 30, so that the installation space of the battery cell 200 is increased.

Further, the distance between the two probe assemblies 40 is adjustable, so as to adapt to the battery cells 200 with different pitches of the tabs 210, thereby improving compatibility.

Specifically, as shown in fig. 1 and 2, the connector 41 includes a main body 411 and a sliding portion 412, the sliding portion 412 is vertically disposed at one end of the main body 411, the sliding portion 412 is provided with a first oblong hole 4121 extending along a length direction (a length direction of the sliding portion 412, i.e., a direction in which the two probe assemblies 40 relatively slide), the other end of the main body 411 is connected to the probe 42, the electrical resistance testing device further includes a first nut, and the elastic assembly 30 is threaded through the first oblong hole 4121 and is connected with the first nut. Through the above structure, when adjusting the interval between two probe assemblies 40, can realize the regulation of both through not hard up first nut, wait to adjust the distance after, screw up first nut again can.

Still further, the distance between the probe 42 and the elastic component 30 is adjustable, so that the probe can be adapted to the battery cells 200 with different lengths of the body portions of the battery cells 200 (the length here is the distance between the body portions in the extending direction of the tab 210 of the battery cell 200), thereby improving compatibility.

Specifically, as shown in fig. 1 and 2, the other end of the main body 411 is provided with a second oblong hole 4111 extending along the length direction (the length direction of the main body 411, i.e., the direction of the relative sliding between the probe 42 and the elastic component 30, which is perpendicular to the length direction of the sliding portion 412), the probe component 40 further includes a second nut, and the elastic component 30 is threaded through the second oblong hole 4111 and is connected with the second nut. Through the structure, when the distance between the probe 42 and the elastic component 30 is adjusted, the second nut can be loosened, the adjustment of the probe 42 and the elastic component can be realized, and after the distance is adjusted, the second nut can be screwed down again.

In this embodiment, the fixing base includes a base and a bracket that are vertically disposed, the cylinder is fixed on the bracket, and the fixing base is used for placing the battery cell 200. It can be understood that the cell resistor testing device further comprises other structures, and the other structures are all structures in the testing device in the prior art, and are not described herein.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The cell resistor testing device is characterized by comprising a fixed seat, a driving piece (10), a fixed piece (20), two elastic assemblies (30) and two probe assemblies (40); the battery cell (200) can install in the fixing base, driving piece (10) set up in the fixing base, mounting (20) drive connect in the output of driving piece (10), two elastic component (30) interval set up in mounting (20), just elastic component (30) sliding connection in mounting (20), elastic component (30) enable probe subassembly (40) with distance between mounting (20) is adjustable, two probe subassembly (40) set up respectively in two one end of elastic component (30), two distance between probe subassembly (40) is adjustable, driving piece (10) can drive mounting (20), drive simultaneously probe subassembly (40) orientation battery cell (200) motion and butt in lug (210) of battery cell (200).

2. The cell resistance testing device according to claim 1, wherein the elastic member (30) comprises:

the guide rod (31) is arranged in the fixing piece (20) in a sliding mode and connected with the probe assembly (40); and

the elastic piece (32) is sleeved on the guide rod (31) and arranged between the probe assembly (40) and the fixing piece (20).

3. The device for testing the electrical core resistance according to claim 2, wherein one end of the guide rod (31) is provided with a limiting portion (311), the limiting portion (311) can be abutted against the fixing piece (20), and the other end of the guide rod (31) is slidably arranged through the fixing piece (20) and connected to the probe assembly (40).

4. A device for testing a cell resistor according to claim 3, wherein the elastic component (30) further comprises a linear bearing (33), one end of the linear bearing (33) is disposed on the fixing member (20), the limiting portion (311) can be abutted to the other end of the linear bearing (33), and the other end of the guide rod (31) sequentially slides through the linear bearing (33) and the fixing member (20) and is connected to the probe component (40).

5. The cell resistance testing device according to claim 1, wherein the elastic component (30) is a hydraulic buffer.

6. The device according to claim 5, wherein the elastic member (30) comprises a cylinder and a piston member, the cylinder is disposed on the fixing member (20), one end of the piston member is slidably connected to the cylinder, and the other end of the piston member is sealingly inserted through the cylinder and connected to the probe member (40).

7. The device according to any one of claims 1-6, wherein the probe assembly (40) comprises a connector (41) and a probe (42), one end of the connector (41) being connected to the elastic assembly (30) and the other end being connected to the probe (42).

8. The device according to claim 7, wherein the connecting member (41) comprises a main body portion (411) and a sliding portion (412), the sliding portion (412) is vertically disposed at one end of the main body portion (411), the sliding portion (412) is provided with a first oblong hole (4121) extending along a length direction thereof, the other end of the main body portion (411) is connected to the probe (42), the device further comprises a first nut, and the elastic component (30) is disposed through the first oblong hole (4121) and is in threaded connection with the first nut.

9. The device according to claim 8, characterized in that the distance between the probe (42) and the elastic component (30) is adjustable.

10. The device for testing the electrical resistance of the electrical core according to claim 9, wherein a second oblong hole (4111) extending along the length direction of the main body portion (411) is formed at the other end of the main body portion, the probe assembly (40) further comprises a second nut, and the elastic assembly (30) is threaded through the second oblong hole (4111) and is connected with the second nut.